为了满足市民的需求,某市在一条小河的两侧开辟了两条长跑锻炼线路,如图:①
;②
.经勘测,点
在点
的正东方,点
在点
的正北方
千米处,点
在点
的正西方
千米处,点
在点
的北偏东
方向,点
在点
的正南方,点
在点
的南偏西
方向.由于时间比较宽松,小明决定选择一条较长线路进行锻炼,请计算说明小明应该选择线路①还是线路②呢?(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9272946c16e164a9e56ac4e728410c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00131421d2987c168cd6c2fceadb11b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a929d0d84e3654f03694adc8d1a326e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
2024·湖南娄底·三模 查看更多[1]
更新时间:2024-05-25 16:38:40
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相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,正方形
中,
,点E是对角线
上的一点,连接
.过点E作
,交
于点F,以
、
为邻边作矩形
,连接
,
.
;
②矩形
是正方形;
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的值.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
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②矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c17d5b76e2dbaaa6e295f0d5dad969b.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,将△ABC沿射线AB平移4cm后能与△BDE完全重合,连接CE、CD交BE于点O,OB=OC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/63960349-a836-4c14-a5b7-45c4325e556b.png?resizew=252)
(1)求证:四边形CBDE为矩形;
(2)若S△BOC=
cm2,求∠ACD的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/63960349-a836-4c14-a5b7-45c4325e556b.png?resizew=252)
(1)求证:四边形CBDE为矩形;
(2)若S△BOC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐1】如图(1),在平行四边形ABCD中,AB=20, AD=30,∠ABC=60° ,点P从点D出发沿DC向点C匀速运动,速度为每秒3个单位长度; 同时,点Q从点B出发沿BA向点A匀速运动,速度为每秒2个单位长度.当点P停止运动时,点Q也随之停止运动. 过点P作PM⊥AD交AD于点M ,连接PQ,QM ,设运动的时间为t秒(
).
![](https://img.xkw.com/dksih/QBM/2019/12/11/2352993939398656/2353720450703360/STEM/3e2cbcda25fd4168a358904571031cf2.png?resizew=576)
(1)当QP⊥PM时,求t的值;
(2)如图(2)连接MC,是否存在t值 ,使得△PQM的面积是平行四边形ABCD面积的
? 若存在,求出对应的t值;若不存在, 请说明理由;
(3)如图(3),过点M作MN//AB交于点N,是否 存在t的值, 使得点P在线段MN的垂直平分线上? 若存在, 求出对应的t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5c56f833b06387cbc23747f1ce80bb.png)
![](https://img.xkw.com/dksih/QBM/2019/12/11/2352993939398656/2353720450703360/STEM/3e2cbcda25fd4168a358904571031cf2.png?resizew=576)
(1)当QP⊥PM时,求t的值;
(2)如图(2)连接MC,是否存在t值 ,使得△PQM的面积是平行四边形ABCD面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ee3c61d2298e75fc4f1643f8ebc2e4.png)
(3)如图(3),过点M作MN//AB交于点N,是否 存在t的值, 使得点P在线段MN的垂直平分线上? 若存在, 求出对应的t的值;若不存在,请说明理由.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,点D为
边的中点,以
为直径作
,分别与
、
交于点E、F,过点E作
于G.
是
的切线;
(2)若
,
的直径为5,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
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(2)若
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您最近一年使用:0次